What's New in 1.15.0 Graphics - Saturn's and Uranus's rings now lie in the equatorial plane. They used to stand on edge and spin with the planet - City lights come on across Earth's night side, following the real day/night terminator - A thin blue atmosphere now shows at Earth's limb - Earth's map is now a sharper, higher-resolution image - Pluto now uses the real map from NASA's New Horizons, heart-shaped plain included - A soft glow now surrounds the Sun - Comet tails grow as comets near the Sun and vanish far from it Positional Accuracy - Planets and dwarf planets now sit on their real orbital planes. Every body used to lie flat in the ecliptic, so steeply inclined ones like Pluto and Eris were far off their own orbit lines - Fixed comets and spacecraft such as Voyager and Pioneer being drawn mirror-imaged. Halley's Comet was more than 100° away from where it really is - Orbit lines are drawn more finely, so distant bodies sit exactly on them - Orbital data for Pluto, Eris and the other dwarf planets was refitted, so the distances and periods shown are closer to the real values - Verified in 3D against JPL Horizons positions across 1900-2100 Performance - The starfield is now drawn in a single pass, greatly reducing graphics load iPhone Duo - Folding or unfolding keeps the body you're viewing and your zoom level Your favorites, achievements and streak are all preserved.

What's New in 1.14.0 Positional Accuracy - The Moon is now where the real Moon is. It used to be drawn far from its true position even on eclipse days - The Moon's ecliptic latitude and orbital inclination are modelled. Every moon used to sit exactly in the ecliptic, which would mean an eclipse every single month - Planets travel real elliptical orbits instead of circles, speeding up near perihelion and slowing near aphelion as they should - Earth's rotation is anchored to real sidereal time, so the day/night terminator falls where it really does — and with a fixed axis, the seasons appear - All ten moons (the Moon, Phobos, Io, Titan and the rest) use measured orbital data - Verified against JPL Horizons positions across the full 1900-2100 range Eclipse Shadows - During a solar eclipse the Moon's shadow now falls on Earth in its true place - Umbra and penumbra are computed at real size. The umbra is about 2% of Earth's diameter, so it reads as a small dot — which is exactly how it looks from space - Annular eclipses draw a lighter shadow, because the Sun is never fully covered Three Scale Axes - Body size, orbit spacing and moon distance are three independent controls - Set all three to the right and the famous check holds: the other seven planets, laid end to end, just fit inside the Moon's orbit - At realistic size the Sun reaches its true 109 Earth radii - Your choices are remembered Navigation - Selecting a body follows it as time advances - You can tap orbiting planets directly in the 3D view - Two-finger drag slides the view - Step the date by exact units: 10 years, 1 year, 1 month, 1 week, 1 day - Step playback speed the same way: 1 hour, 1 day, 1 week, 1 month, 1 year per second - The speed range now reaches a year per second, so the slow outer planets — Neptune above all — finally get somewhere - The bottom bar can be hidden on iPhone Astronomical Events - Jump straight to an event's date from the calendar - Meteor showers jump to their peak, not the start of the viewing window Learning - New topic, "Scale and Distance", on why true scale cannot be drawn on a screen and what this app exaggerates as a result Other Improvements - Fixed moons such as Io appearing inside their parent planet at realistic size - Fixed the Moon's orbit overlapping Venus's - Fixed Triton not moving at all - Fixed the outer planets being clipped away when orbits were widened - Selecting a body now shows a shortcut into the Learning Center Your favorites, achievements and streak are all preserved.

- improve UI

Asteroid 4 Vesta is added

- Reduce Energy Impact - Fix iPhone UI

Explore Artemis II — NASA's historic return to the Moon! • NEW: Artemis II (2026) added to the spacecraft catalog NASA's first crewed lunar mission since Apollo 17 (1972). Launched April 1, 2026 from Kennedy Space Center, four astronauts flew a 10-day free-return trajectory around the far side of the Moon aboard the Orion spacecraft. A partnership between NASA and the Canadian Space Agency. • NEW: Tap any spacecraft to travel to its launch date instantly Want to relive Voyager's Jupiter flyby or watch Artemis II lift off? Just tap the spacecraft — the simulation jumps straight to mission start. • NEW: Smart time speed for every mission Short missions like Artemis II (10 days) automatically play at a slower time scale so you can actually watch them unfold, while decades-long journeys like Voyager speed up to keep things moving.

- Fix ui error in iphone

- iCloud Sync: Your achievements, favorites, and stats now sync across all your devices - Widgets: Home screen and Lock Screen widgets for upcoming astronomy events - Live Activity: Real-time countdown on Lock Screen and Dynamic Island for imminent events - Live Event Data: Automatic updates with the latest astronomy events, including near-Earth asteroids and geomagnetic storms via NASA - Bug fixes and performance improvements

- fix iphone ui

- iPad 7 size support

- add more education problems

- fix ui error

- Improved cache performance for spacecraft position data - Optimized memory usage and app responsiveness - Bug fixes and stability improvements - add locales

[Learning Center Added] - Astronomy concepts - 10 topics including Kepler's laws, gravity, planetary composition - Mission stories - History and timeline of 8 spacecraft: Voyager, Cassini, New Horizons, and more - Quiz feature - Test your knowledge with quizzes at 3 difficulty levels - Available in 3 languages (English, Korean, Japanese) [Improved Zoom] - Extended maximum zoom range for observing farther distances [Bug Fixes] - Improved app stability - Fixed API connection issues

• Improved planet colors - More accurate representation of actual planet colors • Fixed comet orbital motion • Improved camera controls and zoom behavior

New Features • Planet-centered view - Observe the solar system from the perspective of a selected planet Bug Fixes • Fixed comet orbital motion accuracy • Improved zoom/pan behavior after selecting celestial objects • Fixed camera transition issues when switching views

[New Content] - 5 Dwarf Planets: Pluto, Ceres, Eris, Makemake, Haumea - 4 Comets: Halley, Encke, Hale-Bopp, NEOWISE - 10 Major Moons: Moon, Phobos, Deimos, Galilean moons, Titan, Enceladus, Triton - Deep Sky Objects expanded: 57 to 124 (Complete Messier catalog) [iPhone Support] - Explore the solar system on your iPhone - Optimized UI for iPhone [Improved Controls] - Responsive layout improvements for iPad - Smoother camera controls with optimized sensitivity

[New Features] • Realistic star background based on actual astronomical data - ~150 bright stars (Sirius, Vega, Betelgeuse, etc.) - ~530 stars in the Milky Way region • 36 Deep Sky Objects added - Galaxies (M31 Andromeda, M51 Whirlpool, etc.) - Nebulae (M42 Orion, M1 Crab, etc.) - Star Clusters (M45 Pleiades, Omega Centauri, etc.) • Deep Sky Object Search - Search stars, galaxies, nebulae, and clusters - Camera automatically navigates to selected object - Catalog number search support (M31, NGC, etc.) • Data Sources information page (NASA, IAU, etc.) [Improvements] • Collapsible planet selector bar • Improved top control bar layout • Enhanced skybox camera tracking